Today's politicians seem more comfortable invoking God and religion than they do presenting facts or numbers. Of course, everyone is entitled to his or her own religious beliefs. But when science and reason get shortchanged, so does America's future. With science, we put together observations with explanatory frameworks whose predictions can be tested and ultimately agreed on. Empirically based logic and the revelatory nature of faith are very different methods for seeking answers, and only logic can be systematically improved and applied. As we head toward the next election, it's important to keep an eye on how our political leaders view...